I bought these to sleep in, but they are so awesome I will be wearing these to run and exercise in. I am 127 lbs. I wear a size 2 jeans and I am a 32dd bra. I ordered the size small. It fits perfectly. Some people said order up a size. I didn't. I like my bras to keep the girls in. The material is so soft and stretchy. I am very happy with my purchase. The colors are fun and the bands are not adjustable. That's why I bought the size I normally wear. I don't know why everyone who leaves a review doesn't put their weight, size, and bra size to help other people out. I buy a lot of things on Amazon and I always read the review. So I hope mine is helpful. I will be buying more bras in different style and colors. The price is right and so is the product!!